Skimming device for coal jigs



may 212, w23.

E. T. ANDERSON ET AL SKIMMING DEVICE FOR COAL JIGS 2 sheets-sham 1 Filed March ,15. 1921 ocooaaaa neocons a U D 1n.: u .n a a c u unqanobu noa INVENTORS May 22, H923.

E. T. ANDERSON ET AL.

SKIMMING DEVICE FOR COAL nes Filed March 15. 1921 2 Skeeter-Sheet. 13l

IN VEN TOR5.

ATTORNEY Patented May 22, i923.

EDG-AR T. ANDERSON AND WILLIAE VIOEGAN, OF SCRANTON, PENNSYLVANIA.

SKIIVMING DEVICE FCR COAL JIGS.

Application filed March 15, 1921. Serial No. 452,487.

To @ZZ whom t may concern.'

Be itI known that we, EDGAR T. NDnRsoN and WILLIAM MORGAN, citizens of the United States, and residents of Scranton, in the county of Lackawanna and State of Pennsylvania, have invented an improvement in Skimming Devices for Coal Jigs, of which the following is a specification.

Our invention relates to means for removing or separating from coal or other like material such impurities as are lighter than the coal or other material. In the case of coal which has been on re, there is usually, if not always, present a certain amount of ashes and cinders which is lighter than the coal, and our invention is well adapted for removing and separating the same from the coal.

Our invention has for its object broadly to provide a jig with means for interrupting the forward flow of the relatively light material in the jig-pan and for discharging the same therefrom separately from the coal.

A. further object of our invention is to provide a jig-pan with means for catching and holding the lighter impurities, such as cinders or ashes, and for discharging the same when the water is withdrawn from the jig tank.

Other ob"ects of our invention will be pointed out in the detailed description thereof which follows or will be apparent. from such description.

In order that our invention may be readily understood and its practical advantages fully appreciated, reference may be had to the accompanying drawing in which we have illustrated a preferred form of embodiment thereof; but it will be understood that our invention is susceptible of embodiment in other forms of construction than that shown and that changes in the details of construction may be made within the scope of the claims without departing from the said invention.

In the drawing:

Fig. l is a vertical longitudinal sectional view of a jig provided with our invention and also showing in section a tank in which the jig-pan is situated;

Fig. 2 is a transverse sectional view of the jig taken on the line 22 of Fig. l;

Fig. 3 is a vertical transverse sectional view of the separating or skimming device, a portion only of the jig being` shown; and Fig. 4 is a view similar to that shown in Fig. l but showing additional parts of the complete apparatus.

Referring to the drawing: l designates a jig-pan which is situated in a tank 2 containing water, as shown. The water is adapted to be discharged from the tank through an outlet port controlled by'a valve 3. The jig-pan is supported in known manner; that is, by bars 4f, only one of which is shown, suspended from the eccentrics l upon the revoluble shaft 4b which shaft and eccentrics are shown in Fig. i of the drawings. The coal, together with slate and such otherI impurities, such as ashes, cinders, etc., as may be present, is delivered by the chute 5 to the jig-pan l and moves forward therein under the gate 6 which is adjustable, the adjusting means being omitted, however, from the drawing. The coal and such impurities, whether lighter or heavier than the coal, as may be present move forward in the jig-pan, the slate, stone, etc., which are heavier than the coal resting upon the perforated bottom thereof, the coal upon the heavier material, and the material lighter than the coal being situated above the latter. The slate is discharged in known manner over the pivoted gate 7 supported at its outer swinging edge by rods or bars 8, the upper ends of which are connected to the inner ends of levers 8a pivoted intermediate their ends to upright posts or bars 8b secured to the opposite sides of the tank 2. The outer ends of the levers 8a are weighted as shown and in known manner.

operates to remove the same from the tank while the coal is discharged from the jig-pan through a chute on to a conveyor-WL by means ofv which it also is removed from the tank.

`@orne of the light material, such as ashes, will rise at once, after it passes underneath the gate 6, to the top of the water, while others of the lighter impurities may remain submerged in the water of the tank but above the coal. All of the lighter material, however, is caught by means of the skimming device or separator comprising the perforated metal sheet 10 which extends transversely of or across the tank above the top surface of the bed of coal shown at 11. The lower portion of the sheet 10 is inclined rearwardly; that is, toward the receiving end of the tank, as shown, and terminates at its lower edge in a vertically depending portion 12. The upper portion of said sheet The slate is disf `charged on to an endless conveyor 9 which surface of the water in the tank 2. The

opposite ends of the sheet 10 are secured to the end plates 15.vv rlhe bottom plate 16 extends between the lower ends of the end plates 15 and is in contact with the lower edge of the portion 12 of the sheet 10. The opposite endv portionsof the bottom plate 16 are inclined downwardly and inwardly to a discharge funnel 17, the lower end of which projects through the bottom of the jig-pan. A perforated baflle plate 2O is secured at its opposite ends to the upper portions ofthe vend plates 15 and is inclined so that it occupies a plane substantially parallel with the plane of the flange 14. The said baille plate 20 is situated a short distance below the flange 14 with its upper rear edge substantially inthe plane of the top surface of the water in the tank.` rllhe skimming or separating device, comprising the sheet 10 together with the parts secured thereto and carried thereby, is adjustably supported by means of the rods 22. These rods extend through openings in the upper part of the semi-circularportion 13 of the sheet 10 and the heads 21 thereof'contact with the under side of the said part. IThe upper ends of the said rods extend through openings in a cross` bar 23 the opposite ends of which are extended downwardly, as indicated at 24, and are connected to the sides of the jig-pan 1, as indicated at 25. By adjusting the nuts 26 upon the upper ends of the rods 22 the skimmingl or separating device may be raised or loweredin the jig-pan 1.v

The said skimming or separating device should be adjustable in order that the rear upper edges of the flange 14, and of the baffle plate 20, 'may occupy the proper relative positions with respect to the top surface ofthe water in the tank 2.

It will be noted that the angle between the flange 14 and the rear edge of the semicircular upper portion 13 of the sheet 10 ex* tends a short distance below the top surface of the water. As the jig-pan is rocked and vibrated by the eccentrics from which it is suspended, the upperedge of the baffle plate V20` passes at intervals below the top surface of the water so that any material, such as ashes, floating upon the surface flows over the said edge and underneath the edge or corner formedat the connection or joinder between the flange 14 and the rear edge of the upper semi-circular portion 13 of the sheet 10.' The lower forwardedge of the baffle plate 20 yis situated a short distance in`-rear of and substantially parallel with the rearwardly inclined portion of the sheet 10. The level of the coal within the region of the separator does not rise to or above the top of the discharge funnel 17 so that none of it passes or escapes through said funnel.

F rom time to time the water is dischaged from the tank 2 and at such times the portions of the ashes, cinders and other ma terial lighter than the coal or other material being washed, which have passedover the outeredge of the baffle plate 20, as well as those which have passed underneath the said plate and which have been caught or interrupted in their forward movement by the portion of the sheet 10 below the said plate 20, descend and escape through the funnel discharge 17 into the tank 2, being finally discharged through the valve controlled opening in the bottom of lsaid tank. l

rlhe portions of the ashes, cinders or other light material, which have been trapped between the baffle plate 20 and the semicircular portion 13 of the separator sheetL 10, flow downward with the water between the forward edge of the baffle plate and the adjacent portion of the said sheet 10 and along the rear side of the latter onto the bottom sheet 16 and thence to and through vthe discharge funnel 17.

1t will be seen that we have providedV a simple,vcheap and efficientdevice for separating the relatively light material from the coal or other heavierfmaterial which is` being washed; and further, that saidde? vvice can readily be applied to jig-pans altank, and for catching such lighter' material as may be within the body of the water and above the top surface 0f the bed of coal in the'jig, and means for discharging the said material from the said jig into the jig tank when the water is withdrawn from the latter, whereby the said material is withdrawn withy the water from said jig tank.

2. A jig for washing coal or other similar material, having a device for separating` relatively. light material from the Said coal or other material, the'said device comprising a perforated sheet extending transversely of the jig the upper portion of which is curved and extended rearwardly a distance beyond a vertical planev through the lower.

edge portion of the said sheet, a bottom plate.

contacting with and extending rearwardly fromv the lower edge of the said sheet, anda discharge funnel opening downwardly from the said sheet.

3. A jig for washing coal or other similar material, having a device for separating relatively light material from the said coal or other material, the said device comprising a perforated sheet extending transversely of the said jig, the upper portion of said sheet being semi-circular in cross section and extending rearwardly to a point bcyond a vertical plane through the lower edge portion of said sheet, a bottom plate contacting with the lower edge of the said perforated sheet and extending rearwardly therefrom, the opposite end portions of said plate inclining inwardly, and a discharge funnel leading from the central portion of said plate and extending through the bottom of the said jiO'.

4. A jig for washing coal or other similar material, having a device for separating relatively light material from said coal or other material, the Said device comprising a perforated sheet extending transversely of the said jig, the upper portion of said sheet being semi-circular in cross section and extending rearwardly and terminating at its rear edge in a rearwardly and upwardly inclined flange portion, end plates secured to the opposite ends of the said sheet and closing the opposite ends of the said semi-circular portion, a baffle plate secured to the said end plates and being arranged a short distance from and in substantial parallel relation with the said flange, a bottom plate secured to the lower ends of the said end plates, and a discharge funnel leading from the central portion of the said bottom plate through the bottom of the said jig.

5. A jig for washing coal or other similar material, having a device for separating the relatively light material from said coal or other material, the said device comprising a perforated plate extending transversely of the said jig, and the upper portion of which is semi-circular in cross section, the said semi-circular portion extending rearwardly and terminating in a rearwardly and upwardly extending flange the upper edge of which projects above the top surface of the water in the jig tank, and the upper part of the semi-circular portion projecting above the top surface of such water, and plates secured to the opposite ends of the said perforated sheet and closing the opposite'end portions of the said semi-circular portion, a bottom plate secured to the lower ends of the said end plates, and a funnel secured in an opening vwithin the said bottom plate and extending therefrom through an opening in the bottom of the said jig.

6. A for washing coal or other similar material, having a device for separating relatively light material from said coal or other material, the said device comprising a perforated sheet extending transversely of the said jig, the upper portion of which is semi-circular in cross section, the said semi-circular portion extending rearwardly and terminating in a flange which extends rearwardly and upwardly, they upper edge of which flange is situated above the top surface of the water in the tank, end plates secured to the said perforated plate, which plates close the opposite ends of the said semi-circular portion, a baffle plate extending between the said end plates, which baille plate is situ-ated a short distance below the said flange and in substantially parallel relation therewith, and the upper rear edge of the said battle plate normally occupying a. position near or in the plane of the top surface of the water in the tank, and means for causing the discharge of the relatively light material which has been caught by the said device from the jig when the water is discharged from the jig tank.

7. A jig for washing coal or other similar material, having a device for separating relatively light material from said coal or other material, the said device comprising a perforated sheet extending transversely of the said jig, means for supporting the said sheet in proper position within the said jig, a bottom plate extending rearwardly from the lower edge of the said perforated sheet, the said bottom plate having `an opening` at its central portion and a discharge funnel extending from said opening through an opening in the jig, substantially as described.

, 8. A jig for washing coal or other simil-ar material, having a device for separating relatively light material from said coal or other material, the said device comprising a perforated metal sheet extending transversely of the said the upper portion of which is semi-circular in cross section and extends rearwardly to apoint beyond a vertical lplane through the lower edge of the said sheet, plates secured to the opposite ends of the said perforated sheet, a bottom plate extending rearwardly from the lower edge of the said perforated sheet, said bottom plate having an opening therethrough at its central portion, a funnel secured to the said bottom plate and extending downwardly from said opening through an opening in the bottom of the jig, and means for adjustably supporting the said perforated sheet and the parts of the device secured thereto and carried thereby.

9. A` pan for washing coal or other similar material having a device for separating relatively light material from said coal or other material, the said device comprising a perforated sheet extending transversely of the said jig pan, the upper portion of said sheet being curved and extended rearwardly, the rear edge of the said perforated plate being situated a short distance above the surface of the water in the jig pan tank, a baffle plate situated underneath the rearwardly curved portion of said perforated sheet, the forward edge of said ba'le plate being spaced a short distancel from the said perforated plate and the said battle plate being inclined upwardly andv forwardly so that a relatively narrow channel is formed between the rear upper edgeportion thereof and the rear edge of said perforated plate, a substantially horizontally arranged bottom plate situated at the lower edge of the said transversely eX- tending perforated` plate7 and a discharge funnel leading from the said bottom plate through the bottoni of the said jig pan. y

In testimony that we claim the foregoing as our invention, we have hereunto signed 10th 'day of March A. D., 20

our naines this EDGAR T. ANDERSON. wrLLrAM MoRGAN. 

